CN108698262B - 带的制造方法、用于该带的制造方法的圆筒模具及交联装置 - Google Patents

带的制造方法、用于该带的制造方法的圆筒模具及交联装置 Download PDF

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CN108698262B
CN108698262B CN201780012862.8A CN201780012862A CN108698262B CN 108698262 B CN108698262 B CN 108698262B CN 201780012862 A CN201780012862 A CN 201780012862A CN 108698262 B CN108698262 B CN 108698262B
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China
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mentioned
cylinder mould
electromagnetic induction
formed body
rotating mechanism
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CN108698262A (zh
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辻野光一
樱井浩和
泉央
宫西正树
峠下友作
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Bando Chemical Industries Ltd
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Bando Chemical Industries Ltd
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

准备由金属制成的圆筒模具(43)、筒状的成形体(36)、将圆筒模具(43)支承为能够进行旋转的旋转机构(41)、通过电磁感应加热对圆筒模具(43)进行加热的电磁感应线圈(47a、47b、47c),将成形体(36)布置在圆筒模具(43)的内侧,在边利用旋转机构(41)使圆筒模具(43)旋转边从内部对成形体(36)进行了加压的状态下,利用电磁感应线圈(47a、47b、47c)加热并按向圆筒模具(43)侧进行加热,从而成形筒状的带坯(S)。

Description

带的制造方法、用于该带的制造方法的圆筒模具及交联装置
技术领域
本发明涉及一种多楔带、V带、齿带、平带等带的制造方法、用于该带的制造方法的圆筒模具及交联装置。
背景技术
迄今为止,作为制造这种具有V形楔的带的方法,硫化成形方法已为人所知,例如专利文献1所述,在该硫化成形方法中使用设置为同心状的分别呈圆筒状的内模具和外模具。该内模具由橡胶等挠性材料形成,外模具由金属等刚性材料形成。该外模具的内周面构成为成形面,在内周面上设置有V形楔形成槽,V形楔形成槽在外模具的轴向上相隔一定间距。此外,在外模具上设置有温度调节机构,该温度调节机构通过使水蒸气等热介质、水等冷介质流通来进行温度调节。此外,将橡胶套筒以内嵌的状态设置在外模具的内周面侧后边使内模具膨胀而加压边对内模具加热的方法已为人所知,其中,在上述橡胶套筒上设置了通过设置各材料而形成的层叠体。
专利文献1:日本专利第5156881号公报
发明内容
-发明所要解决的技术问题-
就以往的外模具而言,由于在内部设置了用于使加热用或者冷却用介质流通的温度调节机构,因此存在结构复杂且还耗费外模具的加工时间和加工费的问题。
而且,必须给每一种带准备不同的外模具,从而加工困难,因此无论是时间上还是成本上都会成为问题。
本发明是鉴于所述问题而完成的,其目的在于,实现:能够用简易的模具将带加热成形。
-用以解决技术问题的技术方案-
为了达到上述目的,本发明的上述带的制造方法中,
准备由金属制成的圆筒模具、筒状的成形体、将该圆筒模具支承为能够进行旋转的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯。
若按照上述方式构成,则不需要在圆筒模具的内部设置用于流通加热用或者冷却用介质的套管(jacket),也不需要用于此的管道。若是电磁感应线圈,则只要流过电流就能够加热圆筒模具,因此用简单设备就足够。此外,由于没有形成有用于使加热用或者冷却用介质流通的通路,因此圆筒模具的形状简单,由此容易用电磁感应线圈以均匀的温度加热成形体。
此外,也可以为,设置有多个上述电磁感应线圈,各电磁感应线圈对上述圆筒模具的外周的至少一部分进行双重加热。这样一来,就能够消除利用电磁感应线圈进行的加热不充分的区域而尽可能将整个圆筒模具加热成均匀的温度。
此外,至少一个上述电磁感应线圈以超出上述圆筒模具的轴向端部的方式布置而对该轴向端部进行加热。这样一来,容易将圆筒模具的轴向端部的温度保持为均匀的温度。
此外,也可以为,基于布置在上述圆筒模具的周围的多个温度传感器的信息,对各个上述电磁感应线圈的电流或者电压进行控制,从而对上述圆筒模具的整个外周的温度进行调节。这样一来,能够根据用各个温度传感器得到的圆筒模具的实际温度对各电磁感应线圈进行控制,因此,能够使整个圆筒模具的温度更加均匀。
此外,也可以为,将流体送入布置在上述成形体的内侧的膨胀套筒内后使上述膨胀套筒膨胀,由此将上述成形体按向上述圆筒模具侧。这样一来,边以均匀的压力被已加热成均匀的温度的圆筒模具推压边可靠地被加热,从而效率良好地加热带坯。在此,流体包括空气、氮、蒸汽、过热蒸汽、机油。
此外,也可以为,加热后向上述圆筒模具的外周直接喷射冷却水进行冷却。这样一来,就能够以放置在旋转机构上的状态下对圆筒模具进行冷却,因此效率佳。
此外,也可以为,以三个点以上的点接触的方式将上述圆筒模具支承在上述旋转机构上。这样一来,施加在圆筒模具的热不会流入其它部件,向模具传递的热会均匀。
此外,也可以为,在上述圆筒模具上没有设置有用于使蒸汽、冷却水流通的管道或者流体流路,上述蒸汽用于加热,上述冷却水用于冷却。例如,可以考虑如下所述的圆筒模具:该圆筒模具不具有上下凸缘部、补强用的梁、管道、流体流路,在该圆筒模具的内表面上形成有V槽部、嵌齿槽部(cog-shaped)或齿槽部(tooth-shaped),除圆筒部以外,该圆筒模具不具有热容量大的金属部,除具有输送用的槽以外,该圆筒模具大致呈圆筒形状的模具。根据不同情况,也可以由上下没有区别的对称的筒状体构成。这样一来,圆筒模具变得极其单纯且在圆周方向上呈均匀的形状,从而更加容易加热成均匀的温度。
此外,也可以为,在圆筒模具的外周面的轴向端部的至少一个端部上形成凹槽。通过设置该凹槽,从而截面面积减小,向端部传递的热也减少。此外,如果将输送用吊具钓接在该凹槽内,则不需要另外加工输送用凹槽等,从而加工费会减少。
此外,也可以为,圆筒模具由单一金属材料形成。这样一来,结构极其简单且容易加热成均匀的温度。
进而,也可以为,将用于上述带的制造方法的交联装置构成为,具有:由金属制成的上述圆筒模具;将上述圆筒模具支承为能够进行旋转的旋转机构;以及通过电磁感应加热对上述圆筒模具进行加热的电磁感应线圈,上述旋转机构具有减小与上述圆筒模具之间的接触面积的多个支承用突部。这样一来,能够减少向旋转机构侧传递的热。
此外,也可以为,上述电磁感应线圈布置在上下方向的多个位置上,相邻的电磁感应线圈布置于在圆周方向上相错开的位置上。这样一来,若以互相不错开的方式上下排列多个电磁感应线圈,则会存在如互相接触的部分,但是若以互相错开的方式布置各个电磁感应线圈,则能够将各个电磁感应线圈在互相不接触的情况下布置成与圆筒模具之间保持有相等的间隙。
进而,也可以为,电磁感应线圈由多个方形线圈构成。也就是说,若是一个圆筒状的线圈,则不能应对圆筒模具的直径的变化,但是若是多个方形线圈,则即使圆筒模具的外径发生了变化,也能够用同一组方形线圈进行应对。
-发明的效果-
根据本发明,在将筒状的带坯按压到金属制圆筒模具的内表面上的状态下,利用电磁感应线圈进行加热,由此,不需要使加热用或者冷却用介质向圆筒模具的内部流通,从而能够用简易的模具将带坯加热成形。
附图说明
图1是通过实施方式所涉及的制造方法1制造的多楔带的立体图。
图2是制造方法1中使用的中心橡胶片的立体图。
图3A是示出制造方法1的部件准备工序的中心橡胶层形成部的制作方法的图。
图3B是沿图3A的IIIB-IIIB线的剖视图。
图4A是示出制造方法1中的成形工序的第一图。
图4B是示出制造方法1中的成形工序的第二图。
图4C是示出制造方法1中的成形工序的第三图。
图4D是示出制造方法1中的成形工序的第四图。
图5A是示出交联装置的剖视图。
图5B是示出圆筒模具的一例的立体图。
图5C是示出圆筒模具的一例的主视图。
图5D是示出圆筒模具的一例的剖视图。
图6A是示出制造方法1中的交联工序的第一图。
图6B是示出制造方法1中的交联工序的第二图。
图6C是示出制造方法1中的交联工序的第三图。
图7是示出制造方法1中的整理工序的图。
具体实施方式
下面,根据附图对实施方式进行详细说明。
图1示出通过实施方式所涉及的制造方法制造的多楔带B。该多楔带B被用作各种设备的动力传递部件。多楔带B的带长度例如为700~3000mm,带宽度例如为10~36mm,带厚度例如为4.0~5.0mm。
实施方式的多楔带B包括橡胶制的带主体10,该带主体10包括厚度方向上的内周侧的中心橡胶层111和外周侧的黏合橡胶层12。由中心橡胶层111构成在厚度方向的内周侧沿长度方向延伸的压缩橡胶层11,构成带轮接触部分的多个V形楔15在带宽方向上排列在压缩橡胶层11上。需要说明的是,该中心橡胶层111可以被表面橡胶层、表面帆布覆盖。芯线13埋设在黏合橡胶层12的厚度方向上的中间部。芯线13被设置为,在黏合橡胶层12内形成带宽方向上具有间距的螺旋。在黏合橡胶层12的外周侧即带背面上贴有补强布14。需要说明的是,多楔带B也可以设置有拉伸橡胶层以替代补强布14,并且可以由压缩橡胶层、黏合橡胶层以及拉伸橡胶层构成橡胶制的带主体。
多个V形楔15分别形成为沿带长方向延伸的截面呈近似倒三角形的突条,并且多个V形楔15沿带宽方向排列着设置。就各个V形楔15而言,楔的高度例如为2.0~3.0mm,基端之间的宽度例如为1.0~3.6mm。楔的数量例如为3~6个(在图1中楔的数量为3个)。
中心橡胶层111由互相不同的橡胶组合物形成,上述橡胶组合物为:在橡胶成分中配合了各种配合剂后进行混炼得到未交联橡胶组合物,对该未交联橡胶组合物进行加热和加压后使其交联而得到的橡胶组合物。能够列举的橡胶成分例如有:乙烯-α-烯烃弹性体(EPDM、EPR)、氯丁橡胶(CR)、氯磺化聚乙烯橡胶(CSM)、氢化丁腈橡胶(H-NBR)等。橡胶成分优选使用上述橡胶成分中的一种,或者将两种以上混合使用。作为配合剂能够列举:炭黑等增强剂、填充剂、增塑剂、加工助剂、交联剂、共交联剂、硫化促进剂、硫化促进助剂、抗老化剂等。
芯线13例如由用聚酯纤维、聚萘二甲酸乙二醇酯纤维、芳纶纤维、维纶纤维等制成的捻线构成。对芯线13实施了用于赋予与带主体10的黏合橡胶层12黏合的黏合性的黏合处理。
补强布14例如由用尼龙纤维、聚酯纤维、芳纶纤维、棉等制成的机织布、针织布或者无纺布构成。对补强布14实施了用于赋予与带主体10的黏合橡胶层12黏合的黏合性的黏合处理。
(制造方法1)
根据图2~图7,对本实施方式所涉及的多楔带B的制造方法1进行说明。
制造方法1由部件准备工序、成形工序、交联工序以及整理工序构成。
<部件准备工序>
在部件准备工序中,制作成为中心橡胶层111的中心橡胶片111’以及成为黏合橡胶层12的黏合橡胶片12’、芯线13’和补强布14’。
-中心橡胶片111’-
利用捏合机、密炼机等炼胶机将橡胶成分和配合剂混炼,便得到了未交联橡胶组合物,然后利用压延成形等使该未交联橡胶组合物形成为厚壁板状的未交联橡胶片111”(仅在图3A中示出)。然后,由该未交联橡胶片111”制作中心橡胶片111’。中心橡胶片111’是如下所述的橡胶片,在中心橡胶片111’的一侧的面上,以并行延伸的方式相连设置有多个中心橡胶层形成部111a’,上述的多个中心橡胶层形成部111a’由分别直线状地延伸的突条构成且用作压缩橡胶层形成部。多个中心橡胶层形成部111a’的形状相同。各个中心橡胶层形成部111a’形成为,其宽度随着接近前端侧而变窄,具体而言,其形成为截面形状呈等腰梯形。能够通过下述方法制作这样的中心橡胶片111’:如图3A和图3B所示,使未交联橡胶片111”通过具有中心橡胶模具的辊21与平辊22之间,并将具有中心橡胶模具的辊21的外周面的梯形槽21a压到未交联橡胶片111”的一侧的面上,从而形成中心橡胶层形成部111a’,其中,在具有中心橡胶模具的辊21上沿轴向相连设置有梯形槽21a,梯形槽21a与中心橡胶片111’的中心橡胶层形成部111a’的形状对应且梯形槽21a沿圆周方向延伸。此外,中心橡胶片111’也能够利用冲压成形或挤出成形来制作。需要说明的是,在用于制造平带等的情况下,中心橡胶片111’的形状也可以保持平坦的未交联橡胶片111”的形状。
-黏合橡胶片12’-
利用捏合机、密炼机等炼胶机,将橡胶成分和配合剂混炼,便得到未交联橡胶组合物,然后通过压延成形等将该未交联橡胶组合物成形为片状来制作黏合橡胶片12’。
-芯线13’-
对构成芯线13’的捻线实施浸渍在RFL水溶液中后进行加热的黏合处理和/或浸渍在橡胶糊中后使其干燥的黏合处理。在进行这些黏合处理之前,也可以进行浸渍在环氧树脂溶液或者异氰酸酯树脂溶液中后进行加热的基础处理。
-补强布14’-
对构成补强布14’的机织布等实施下述黏合处理中的一种或两种以上的黏合处理:浸渍在RFL水溶液中后进行加热的黏合处理、浸渍在橡胶糊中后使其干燥的黏合处理以及将橡胶糊涂布到将成为带主体10侧的面上以后使其干燥的黏合处理。在实施这些黏合处理之前,也可以实施浸渍在环氧树脂溶液或者异氰酸酯树脂溶液中后进行加热的基础处理。需要说明的是,在设置拉伸橡胶层以替代补强布14’的情况下,以与黏合橡胶片12’相同的方法制作将成为拉伸橡胶层的拉伸橡胶片。
<成形工序>
在成形工序中,首先,将圆筒状的成形心轴31以轴向成为水平方向的方式可旋转地轴支承于成形机(未图示)上,如图4A所示,将补强布14’缠绕在成形心轴31上,在该补强布14’上缠绕黏合橡胶片12’。选择与要制造的多楔带B的带长度对应的成形心轴31。此时,黏合橡胶片12’层叠在补强布14’上。在设置拉伸橡胶层的情况下,替代补强布14’而使用拉伸橡胶片来进行同样的操作。
接下来,如图4B所示,将芯线13’以螺旋状缠绕在黏合橡胶片12’上,再将黏合橡胶片12’缠绕在该芯线13’上。此时,芯线13’的层会层叠在黏合橡胶片12’上,此外,黏合橡胶片12’层叠在芯线13’的层上。
接下来,如图4C所示,在整个圆周上用辊32从黏合橡胶片12’的上方进行按压。此时,橡胶在芯线13’之间流动,从而芯线13’被埋设在一对黏合橡胶片12’之间,由此,芯线13’的位置被固定,从而形成了整体上而言是一体化的筒状的抗拉体38。
接下来,如图4D所示,以中心橡胶层形成部111a’位于外侧且沿周向延伸的方式,将中心橡胶片111’缠绕在抗拉体38的黏合橡胶片12’上。此时,通过将导向件33以沿轴向延伸并且梳齿33a朝向成形心轴31侧的方式设置在成形心轴31的外侧,使得中心橡胶片111’以各个中心橡胶层形成部111a’被引导至一对梳齿33a之间而高精度地沿周向延伸的方式被缠绕上,并层叠在黏合橡胶片12’上,其中,上述导向件33呈梳形并且被切成中心橡胶片111’的中心橡胶层形成部111a’侧的形状。
如上所述,在成形心轴31上成形圆筒状的未交联带坯S’,该未交联带坯S’是从内侧依次层叠补强布14’、黏合橡胶片12’、芯线13’、黏合橡胶片12’以及中心橡胶片111’而形成的。该未交联带坯S’包括筒状的成形体36。筒状的成形体36是将中心橡胶片111’形成为筒状而得到的,即,是在外周面上沿轴向相连地设置有由各自沿周向延伸的多个突条构成的中心橡胶层形成部111a’并且是由未交联橡胶组合物形成的。未交联带坯S’中的中心橡胶层形成部111a’的数量例如是20~100个。
需要说明的是,在用于制造平带等情况下,使用平坦的中心橡胶片111’成形未交联带坯S’即可。
<交联工序>
图5A和图5B示出在交联工序中使用的交联装置40。
交联装置40包括作为旋转机构的旋转座41、竖立设置在旋转座41上的圆柱状的膨胀鼓42和设置在膨胀鼓42的外侧的圆筒状的圆筒模具43。需要说明的是,该旋转机构也可以构成不具有圆板状的旋转座41。
膨胀鼓42包括与旋转座41连结的旋转轴42a以及与该旋转轴42a的上部和下部连结的固定环42b,固定环42b与旋转轴42a的上部和下部一体旋转。圆筒状的由橡胶制成的膨胀套筒42c的上端部和下端部密闭状地连结在该上部和下部的固定环42b上。旋转轴42a能够通过未图示的旋转马达,以规定的速度与旋转座41一起旋转。在旋转轴42a的外周部形成有分别与内部连通的多个通气孔42d(附图中只示出一个通气孔42d)。交联装置40构成为:在交联装置40上设置有将高压流体引入旋转轴42a的内部后加压的压缩机等加压单元(不图示),若高压流体通过该加压单元被引入旋转轴42a的内部,则高压流体通过通气孔42d进入旋转轴42a与膨胀套筒42c之间,使膨胀套筒42c向径向外侧膨胀。需要说明的是,该流体可以是空气、氮、蒸汽、过热蒸汽、机油等,其并没有特别限定。本实施方式中,使用空气。
圆筒模具43构成为能够相对于旋转座41拆卸、安装。已安装在旋转座41上的圆筒模具43与膨胀鼓42之间存在间隔,圆筒模具43与旋转座41是同心状地设置的。虽未图示,然而也可以为,例如通过在旋转座41上设置多个支承用突部,来减少向旋转座41传递的热,其中,上述支承用突部减少旋转座41与圆筒模具43之间的接触面积。
如图5B~图5D中所示的一实施例,在圆筒模具43的内周面上设置有分别沿周向延伸的多个压缩橡胶层形成槽43a,上述的多个压缩橡胶层形成槽43a在轴向(槽宽度方向)上排列着设置。各个压缩橡胶层形成槽43a形成为,其宽度随着接近槽底侧而变窄,具体而言,形成为,截面形状是与要制造的多楔带B的中心橡胶层111相同的等腰梯形。按照要制作的多楔带B、V带的规格形成压缩橡胶层形成槽43a的大小。
例如通过对圆钢管等单一金属材料进行切削而制作圆筒模具43。这样一来,结构极其简单且容易加热成均匀的温度,能够使用容易获得且廉价的材料,加工费也低廉。在圆筒模具43的外周面的轴向上的两个端部形成有凹槽43b。该凹槽43b也可以只设置在上端。通过设置该凹槽43b,截面面积减小,从而向端部传递的热减少。此外,若将输送用吊具钓接在该凹槽43b上,则不需要另外加工输送用的凹槽43b等,从而加工费降低。在圆筒模具43的上下方向中间的内周面上形成有压缩橡胶层形成槽43a,形成有该压缩橡胶层形成槽43a的区域的外周面为平坦面43c。也就是说,在该圆筒模具43上并没有设置有用于使蒸汽、冷却水流通的管道或者流体流路,而且构成为上下没有区别的对称的简单的筒状体,其中,上述蒸汽用于加热,上述冷却水用于冷却。这样一来,圆筒模具43呈极其单纯且在圆周方向上均匀的形状,从而更容易加热成均匀的温度。
如图5A所示,在交联装置40上设置有通过电磁感应加热的方式对圆筒模具43进行加热的电磁感应线圈47a、47b、47c,电磁感应线圈47a、47b、47c与圆筒模具43之间存在规定的间隙G1。本实施方式的电磁感应线圈47a、47b、47c例如形成为铁氧体磁芯树脂注塑式的方形线圈。由于是方形线圈,因此,即使圆筒模具43的外径发生了变化,也能够用同一组线圈进行应对。如果是圆筒状的线圈,则无法应对圆筒模具43的直径变化。在图5A中,为了便于观察而将上下中央的电磁感应线圈47b布置在更靠近外侧的位置上,然而,实际上,电磁感应线圈47b布置于在圆周方向上与上下的电磁感应线圈47a、47c相错开的位置上,并且,与上下的电磁感应线圈47a、47c同样地设置在与圆筒模具43的平坦的外周面之间分离了间隙G1的位置上。例如将G1设为5mm。
电磁感应线圈47a、47b、47c的数量并没有特别限制,一般而言,将圆筒模具43的高度设为适当大的高度,这样生产效率就会提高,因此,根据该高度,如图5A所示那样例如设置三个电磁感应线圈。而且,各电磁感应线圈47a、47b、47c同时对圆筒模具43的外周的至少一部分范围G2双重加热即可。这样一来,能够消除由电磁感应线圈47a、47b、47c进行的加热不充分的区域,从而尽可能将整个圆筒模具43加热成均匀的温度。也就是说,电磁感应线圈47a、47b、47c例如通过铁氧体磁芯树脂注塑形成,并且在其上下端部具有低能量部分,因此,通过使该低能量部分重叠,来实现温度均匀化。尤其是,上下的电磁感应线圈47a、47c布置为超出圆筒模具43的轴向端部,并对该上下端部进行加热。这样一来,就有容易将圆筒模具43的轴向端部的温度保持成均匀温度的优点。
此外,基于布置在圆筒模具43周围的多个温度传感器48a、48b、48c的信息,控制各电磁感应线圈47a、47b、47c的电流或者电压,从而调节圆筒模具43的整个外周的温度。例如,上侧的温度传感器48a设置在上侧的凹槽43b的附近,中央的温度传感器48b设置在上下中央,下侧的温度传感器48c设置在下侧的凹槽43b的附近。这样一来,能够按照用各温度传感器48a、48b、48c得到的圆筒模具43的实际温度控制各电磁感应线圈47a、47b、47c,因此能够使圆筒模具43整体的温度更加均匀。通过研究温度传感器48a、48b、48c的布置方式,从而容易对应特别是由于截面面积减小而容易加热的上下端部的温度变化。此外,通过与电磁感应线圈47a、47b、47c同样地设置三个温度传感器48a、48b、48c,从而能够容易控制各个电磁感应线圈47a、47b、47c的电流或者电压。
进而,如图6C所示,在交联装置40上设置有作为冷却单元的多个进行冷却的喷射喷嘴49。向该喷射喷嘴49供给例如水道水、工业用水等。这样一来,就能够以安装在旋转座41上的状态冷却圆筒模具43,因此效率良好。
对使用该交联装置40进行的未交联带坯S’的交联工序进行具体说明。
首先,从成形心轴31上拔出未交联带坯S’,将该未交联带坯S’布置在已从交联装置40的旋转座41卸下的圆筒模具43的内侧。具体而言,以未交联带坯S’的多个中心橡胶层形成部111a’分别嵌入圆筒模具43的对应的压缩橡胶层形成槽43a内的方式,将未交联带坯S’设置在圆筒模具43的内侧。通过以这种方式预先将中心橡胶层形成部111a’嵌入压缩橡胶层形成槽43a内,由此橡胶的拉伸程度变小,因此能够制造结构稳定的多楔带B。选择与要制造的多楔带B的带长度对应的圆筒模具43。需要说明的是,也可以预先使短纤维、树脂粉末等附着在圆筒模具43的内周面和/或未交联带坯S’的外周面上。
接下来,在已将膨胀鼓42抽为真空的状态下,以覆盖膨胀鼓42的方式布置设置了未交联带坯S’的圆筒模具43后,安装在旋转座41上。
接下来,解除膨胀鼓42的真空状态。此时,如图6A所示,设置在圆筒模具43上的未交联带坯S’与膨胀鼓42之间形成有间隙。
接下来,向膨胀鼓42内引入高压流体使膨胀套筒42c膨胀,如图6B所示,在将未交联带坯S’的各中心橡胶层形成部111a’嵌入到圆筒模具43的对应的压缩橡胶层形成槽43a内的状态下,利用膨胀套筒42c进行推压。
接下来,如图5A所示,使旋转座41旋转,使电流流入电磁感应线圈47a、47b、47c,从而将圆筒模具43加热规定时间。
如图6B所示,各中心橡胶层形成部111a’在嵌入到圆筒模具43的对应的压缩橡胶层形成槽43a内的状态下,被圆筒模具43加热,并且与膨胀套筒42c接触,由此,被按向圆筒模具43侧。这样一来,未交联带坯S’所包含的中心橡胶片111’和黏合橡胶片12’的橡胶成分进行交联而成为一体,由此,形成多个多楔带B的由包括中心橡胶层111的压缩橡胶层11以及黏合橡胶层12构成的带主体10的连结体,并且,橡胶成分与芯线13’及补强布14’黏合而实现复合化,最终成形出圆筒状的带坯S。加热温度例如为100~180℃,压力例如为0.5~2.0MPa,加工时间例如为10~60分钟。
<整理工序>
在整理工序中,停止利用电磁感应线圈47a、47b、47c进行的加热,在使电磁感应线圈47a、47b、47c避开之后,如图6C所示,在使旋转座41保持旋转的状态下从喷射喷嘴49喷射冷却水。
接下来,使旋转座41停止旋转,在吹散冷却水之后,再次将膨胀套筒42c抽为真空。
然后,将圆筒模具43从旋转座41卸下来,从圆筒模具43取出成形在其内侧的带坯S。
然后,如图7所示,将从圆筒模具43取出的带坯S以多个(在本实施方式中为三个)中心橡胶层形成部111a’为单位切成环状,再将表里翻过来,由此获得本实施方式的多楔带B。
这样,在本实施方式中,将成形体36布置在圆筒模具43的内侧,在成为压缩橡胶层11的中心橡胶层形成部111a’嵌入到圆筒模具43的对应的压缩橡胶层形成槽43a内的状态下,边利用旋转座41使圆筒模具43旋转边对布置在圆筒模具43的内侧的成形体36进行加热,并且将布置在圆筒模具43的内侧的成形体36按向圆筒模具43侧使其交联,从而成形筒状的带坯,其中,中心橡胶层形成部111a’分别包括成形体36的多个突条。因此,不需要设置用于向圆筒模具43的内部流通加热用或者冷却用介质的套管,也不需要用于此的管道。此外,在使用电磁感应线圈47a、47b、47c的情况下,只要使电流流入就能加热圆筒模具43,因此用简单设备就足够。此外,由于没有形成有用于使加热用或者冷却用介质流通的通路,因此,圆筒模具43的形状简单,由此,容易利用电磁感应线圈47a、47b、47c以均匀的温度加热成形体36。
此外,通过将流体送入布置在成形体36的内侧的膨胀套筒42c后使其膨胀,将成形体36按向圆筒模具43侧,因此,边被已加热至均匀的温度的圆筒模具43以均匀的压力推压边可靠地被加热,从而带坯S效率良好地交联。
由此,根据本发明,做到了在将筒状的带坯S按压到金属制圆筒模具43的内表面上的状态下用电磁感应线圈47a、47b、47c进行加热,因此不需要使加热用或者冷却用介质在圆筒模具43的内部流通,从而能够用简易的圆筒模具43将带坯S交联成形。
(其它实施方式)
本发明的上述实施方式也可以构成为如下。
也就是说,在上述实施方式中,在整理工序中以三个中心橡胶层形成部111a’为单位将带坯S切成环状,将表里翻过来而得到本实施方式的多楔带B,然而也可以为,以一个中心橡胶层形成部111a’为单位切成环状,将表里翻过来而得到切边V带。
在上述实施方式中,以多楔带B、切边V带为例进行了说明,然而作为制造对象的带并不限于此,而是能够应用于任意带中,如能够应用于齿带、平带等中。如果是平带,则不具有内周面的压缩橡胶层形成槽43a,内周面是平坦的。在齿带的情况下,形成与其对应的压缩橡胶层形成槽43a即可。
在上述实施方式中,在将未交联带坯的成形体贴在圆筒模具43的内表面上的状态下进行加压后加热,从而使其交联,然而也可以为,在将成形体贴在圆筒模具43的内表面上的状态下进行加压后加热,从而进行层叠体复合化、一体化,其中,上述成形体是将热塑性弹性体与芯线层叠而得到的。
需要说明的是,以上的实施方式是本质上优选的示例,并没有对本发明、其应用对象或其用途的范围加以限制的意图。
-符号说明-
S 带坯
B 多楔带
10 带主体
11 压缩橡胶层
12 黏合橡胶层
12’ 黏合橡胶片
13、13’ 芯线
14、14’ 补强布
15 V形楔
21 具有中心橡胶模具的辊
21a 梯形槽
22 平辊
31 成形心轴
32 辊
33 导向件
33a 梳齿
36 成形体
38 抗拉体
40 交联装置
41 旋转座(旋转机构)
42 膨胀鼓
42a 旋转轴
42b 固定环
42c 膨胀套筒
42d 通气孔
43 圆筒模具
43a 压缩橡胶层形成槽
43b 凹槽
43c 平坦面
47a、47b、47c 电磁感应线圈
48a、48b、48c 温度传感器
49 喷射喷嘴
111 中心橡胶层
111’ 中心橡胶片
111” 未交联橡胶片
111a’ 中心橡胶层形成部(压缩橡胶层形成部)

Claims (16)

1.一种带的制造方法,其特征在于:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
将布置有上述成形体的上述圆筒模具,以使该圆筒模具的中心轴与上述旋转机构的中心轴一致的方式,同心状地设置在上述旋转机构上,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯。
2.根据权利要求1所述的带的制造方法,其特征在于:
设置有多个上述电磁感应线圈。
3.根据权利要求2所述的带的制造方法,其特征在于:
上述电磁感应线圈对上述圆筒模具的外周的至少一部分进行双重加热。
4.根据权利要求2所述的带的制造方法,其特征在于:
基于布置在上述圆筒模具的周围的多个温度传感器的信息,对各个上述电磁感应线圈的电流或者电压进行控制,从而对上述圆筒模具的整个外周的温度进行调节。
5.根据权利要求1所述的带的制造方法,其特征在于:
至少一个上述电磁感应线圈以超出上述圆筒模具的轴向端部的方式布置而对该轴向端部进行加热。
6.根据权利要求1至5中任一项所述的带的制造方法,其特征在于:
将流体送入布置在上述成形体的内侧的膨胀套筒内后使上述膨胀套筒膨胀,由此将上述成形体按向上述圆筒模具侧。
7.根据权利要求1所述的带的制造方法,其特征在于:
加热后向上述圆筒模具的外周直接喷射冷却水进行冷却。
8.一种带的制造方法,其特征在于:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
以三个点以上的点接触的方式将上述圆筒模具支承在上述旋转机构上,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯。
9.一种带的制造方法,其特征在于:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
将上述圆筒模具以轴向端部成为上部和下部的方式设置在上述旋转机构上,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯。
10.一种带的制造方法,其特征在于:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
将布置有上述成形体的上述圆筒模具以该圆筒模具的中心轴与上述旋转机构的中心轴一致的方式设置在上述旋转机构上,
在边利用上述旋转机构使上述圆筒模具以上述旋转轴为中心旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯。
11.根据权利要求10所述的带的制造方法,其特征在于:
从设置在上述旋转轴上的通气孔将流体送入布置在上述成形体的内侧的膨胀套筒内后使上述膨胀套筒膨胀,由此将上述成形体按向上述圆筒模具侧。
12.一种交联装置,其用于带的制造方法,上述带的制造方法为:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯,
上述交联装置的特征在于:具有:
由金属制成的上述圆筒模具;
将上述圆筒模具支承为能够进行旋转的旋转机构;以及
通过电磁感应加热对上述圆筒模具进行加热的电磁感应线圈,
上述旋转机构具有减小与上述圆筒模具之间的接触面积的多个支承用突部。
13.一种交联装置,其用于带的制造方法,上述带的制造方法为:
准备中心轴上下延伸的中空的由金属制成的圆筒模具、中心轴上下延伸的中空的筒状的成形体、对该圆筒模具的下端侧能够旋转地进行支承的中心轴上下延伸的旋转机构、通过电磁感应加热对该圆筒模具进行加热的电磁感应线圈,
将上述成形体布置在上述圆筒模具的内侧,
在边利用上述旋转机构使上述圆筒模具旋转边从内部对上述成形体进行了加压的状态下,利用上述电磁感应线圈进行加热而成形筒状的带坯,
上述交联装置的特征在于:具有:
由金属制成的上述圆筒模具;
将上述圆筒模具支承为能够进行旋转的旋转机构;以及
通过电磁感应加热对上述圆筒模具进行加热的电磁感应线圈,
上述圆筒模具与上述旋转机构同心状地设置。
14.根据权利要求13所述的交联装置,其特征在于:
上述旋转机构具有形成有通气孔的旋转轴,上述通气孔让用于从内部对上述成形体进行加压的高压流体流出。
15.根据权利要求12至14中任一项所述的交联装置,其特征在于:
上述电磁感应线圈布置在上下方向的多个位置上,相邻的电磁感应线圈布置于在圆周方向上相错开的位置上。
16.根据权利要求15所述的交联装置,其特征在于:
上述电磁感应线圈由多个方形线圈构成。
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